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** What diameter cable can be used as a handrail? - Answer 1/4" steel cable
3 phase rectifier Output? - Answer 1.33 x Input
Single phase rectifier Output? - Answer 0.9 x Input
Rated speed? - Answer Full speed no load
* Time constant question on test? - Answer 45 seconds
** How much weight to add to cwt question on test? - Answer 11 plates
** Inverting OpAmp - Answer Analog Inverting
SCR - Answer Forward Biased
** Sparking on generator? - Answer High Mica
,** Dumbwaiter takes off while loading, why? - Answer Non-Interference not
working
** What can AC generator Interpoles reduce? - Answer Armature Reaction
** Capacitor microfarad discharge question on test? - Answer 5 seconds
** 3rd floor bulb burned out question on test? - Answer Shorted resistor
If you are testing a circuit with a multimeter, what voltage reading would you
expect to have when connected to C and E? - Answer 120 VAC
How do the relay contacts in figure 15 reverse the direction of this 3 phase motor?
- Answer By reversing L1 and L2
You are required to adjust the brake shown in figure 26. For a slower drop, which
of the following adjustments should be made? - Answer Move BD resistor tap
to the left
Refer to figure 22. If the brake contact E fails to open when the brake coil is
energized, what will happen? - Answer The brake coil current will be
unchanged
Refer to figure 28. You observe that the brake time has shortened, preventing the
car from leveling properly. Which of the following would cause this condition? -
Answer Diode open
, ** You need to replace a 3 phase , 60 cycle AC motor which is missing the data
plate that once showed the RPMs. If you know the old motor had 6 poles, what is
the approximate RPMs the replacement motor will be rated for? - Answer 1200
** If a rectifier with a 220 VAC input blows its 200 microfarad 300 VDC filter
capacitor, what is the problem? - Answer Intermittent high output current
** What do you use to keep a machine from moving side to side? - Answer
Kick Angle
* What do you hold a machine beam down with? - Answer Tie downs
* What is the strongest type of rope ? - Answer Seale rope
You are using a 4K capacity hoist reeves 4:1 what is the Max you can lift? -
Answer 16k
** What is the boom out signal? - Answer Arms out, thumbs out
* If there is high screeching, what should you check? - Answer SCR drive
motor bushing
** You get to a job where there is low voltage to a motor after a MOD, during
which the mainline disconnect was moved 30' away. What is the fix? - Answer
Increase wire size